Commando

Much like the Soldier from the original Borderlands, the Commando can drop a Sabre Turret during a fight. Depending on your skill specs, the Sabre Turret can become its own killing machine or a tactical sidekick to your buffed-out guns.

Guerrilla: The guerrilla skill tree focuses on damage for your sabre turret and is very useful when facing tough bosses or opponents. The upgrades that are unlocked in the guerrilla skill tree are added mounted rockets that deal a great amount of damage as well as an additional 2nd gun and the ability to fire slag bullets.

Gunpowder: The gunpowder skill tree gives special skills to your sabre turret. The upgrades in the skill tree are the ability to throw your sabre turret at a farther distance and the nuke. The nuke skill sets off a small nuclear explosion that wipes out enemies in the blast radius. (Some enemies may not die instantly due to the fact that they have a larger health bar)

Survival: The survival skill tree is all about giving that extra protection to your sabre turret. The upgrades found in the survival skill tree are the ability to generate a shield around your sabre turret that protects it from ranged weapon fire. The other two good skills are the ability to put your sabre turret on walls and ceilings which helps out when you want to hit the enemy from behind all you have to do is throw the turret to the wall behind the enemies and watch your turret mow them down. The last skill is being able to throw two turrets which increases your chance of survival.

Note that you cannot have all the skills and special abilities assigned to your sabre turret at one time unless it is a modded character and that the three skill trees also have skills that increase the character itself such as buffs to health or shields and how efficiently you use weapons.